Oddly Wired
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decision making

Your preferences change based on the choices you ignore.

Post-decision dissonance reduction causes you to overvalue your chosen option to maintain cognitive consistency.

This is a key component of Cognitive Dissonance Theory rather than Choice-supportive bias, which refers specifically to memory distortion during retrieval.

You do not choose what you like; you learn to like what you chose.

Where this comes from

Study
choice-supportive bias
What the check found
The phenomenon described is accurately attributed to cognitive dissonance theory, but it is incorrectly labeled as choice-supportive bias, which is a specific memory retrieval effect.
Confidence
Solid, with limits

Related

One of these every day, and every one names the study it came from. When a finding is contested, it says so.